* {
    margin: 0;
    padding: 0;
    color: #333333;
    font-family: sans-serif;
}

header {
    width: 100%;
    height: 150px;
    background-image: url(../images/aim-img/head2.png);
    background-position: 0 -154px;
}

h1 {
    float: left;
    width: 500px;
    padding: 40px 100px;
    font-weight: normal;
}
header a{
    text-decoration: none;
    font-size: 20px;
    padding: 40px 20px;
    float: right;
}
.line {
    width: 500px;
    height: 2px;
    margin: 20px auto;
    background-color: #35b0ab;
}

.menu ul {
    margin: 0;
    padding-left: 25;
}

.menu li {
    /*导航栏*/
    padding: 0;
    list-style: none;
    display: inline-block;
    width: 10%;
    text-align: center;
}

.menu a {
    text-decoration: none;
    position: relative;
    color: #313131;
    font-size: 17px;
    overflow: hidden;
    display: block;
    transition: 0.7s all;
    padding: 14px 0;
}

.menu li a:before {
    content: '';
    width: 70%;
    position: absolute;
    border-bottom: 5px solid #00b894;
    bottom: 0;
    right: 100%;
    transition: 0.7s all;
}

.menu li a:hover:before {
    right: 10px;
}

#bottom_img {
    width: 1380px;
    margin: 100px auto;
}

#bottom_img ul {
    width: 1380px;
    height: 800px；
}

#bottom_img ul li {
    float: left;
    background-color: white;
    width: 300px;
    height: 390px;
    margin: 10px;
    text-align: center;
    line-height: 30px;
    overflow: hidden;
    cursor: pointer;
}

#bottom_img>ul>li>span {
    font-size: 13px;
    position: relative;
    top: 30px;
    left: -50px;
    margin-left: 45px;
}

#line_bottom {
    float: left;
    position: relative;
    left: 700px;

    text-align: center;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    color: rgb(66, 66, 66);
    margin-top: 80px;
}

#line_bottom p {
    margin-top: 30px;
    color: rgb(158, 156, 156);
}

a{
    text-decoration: none;
}